How much does a 3.00 to 4.99ct K SI2 natural oval diamond cost?

As of November 6, 2026, 3.00 to 4.99ct K SI2 natural oval diamonds typically cost €8,709 EUR to €28,586 EUR, with a median price of €17,044 EUR. There are currently 256 diamonds matching this specification available across retailers.

Where can I find the best price on a K SI2 oval diamond?

About 45% of these diamonds are available at multiple retailers, with an average price spread of 49%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct K SI2 Natural Oval

Quick answer

As of November 6, 2026, there are 256 natural oval diamonds with K colour and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run €8,709 EUR to €28,586 EUR, with a median of €17,044 EUR. Half of all listings fall between €4,067 EUR and €6,646 EUR per carat. The same specification in lab grown form lists at a median of about €3,240 EUR per carat. Over the last 30 days the median price moved -1.8% and the number of listings moved +11.5%.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, October 2026: natural diamonds at 2,202 USD per carat and lab-grown at 462 USD per carat, a natural to lab ratio of 4.8 to 1. Oval natural stones in the index: 2,512 USD per carat, -7.2% month on month. See the full index release

Figures come from current listings across more than 125 retailers. The index is a monthly release.

Last updated: November 6, 2026

Available

256

Lowest Price

€4,823 EUR

Highest Price

€65,450 EUR

Average Price

€18,540 EUR

Market Intelligence

Cross Retailer %

44.9%

Price Spread

48.9%

30-Day Price Trend

-1.8%

30-Day Supply Change

+11.5%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$5,890/ct

10th Percentile

$3,182

Median

$5,890

90th Percentile

$9,441

Score Distribution

256 diamonds scored across 4 quality tiers

Excellent

60 (23.4%)

Very Good

69 (27.0%)

Good

42 (16.4%)

Average

85 (33.2%)

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Related Specifications

D IF D VVS1 D VVS2 D VS1 D VS2 D SI1 E IF E VVS1 E VVS2 E VS1 E VS2 E SI1 F IF F VVS1 F VVS2 F VS1 F VS2 F SI1 G IF G VVS1 G VVS2 G VS1 G VS2 G SI1 H IF H VVS1 H VVS2 H VS1 H VS2 H SI1 I IF I VVS1 I VVS2 I VS1 I VS2 I SI1